Enhance WebSocket error handling and implement command idempotency for dropper nickname and recipe management endpoints

web/server/server.js

@@ -107,7 +107,11 @@ function broadcastToClients(data) {
   const message = JSON.stringify(data);
   webClients.forEach((client) => {
     if (client.readyState === 1) {
-      client.send(message);
+      try {
+        client.send(message);
+      } catch (err) {
+        console.error('❌ WS send error (client):', err.message);
+      }
     }
   });
 }
@@ -116,8 +120,12 @@ function pushCommandToBridge(command) {
   let sent = false;
   for (const bridge of bridgeClients) {
     if (bridge.readyState === 1) {
-      bridge.send(JSON.stringify(command));
-      sent = true;
+      try {
+        bridge.send(JSON.stringify(command));
+        sent = true;
+      } catch (err) {
+        console.error('❌ WS send error (bridge):', err.message);
+      }
     }
   }
   if (!sent) {
@@ -352,7 +360,11 @@ app.get('/api/dropper-nicknames', (req, res) => {
 // Set a single dropper nickname
 app.post('/api/dropper-nicknames', (req, res) => {
   try {
-    const { dropperName, nickname } = req.body;
+    const { dropperName, nickname, commandId } = req.body;
+
+    const cached = checkIdempotent(commandId);
+    if (cached) return res.json(cached);
+
     if (!dropperName) return res.status(400).json({ error: 'Missing dropperName' });
     
     if (nickname && nickname.trim()) {
@@ -363,7 +375,9 @@ app.post('/api/dropper-nicknames', (req, res) => {
     
     saveState('dropperNicknames', dropperNicknames);
     console.log(`🏷️ Dropper nickname: ${dropperName} → ${nickname || '(removed)'}`);
-    res.json({ success: true, nicknames: dropperNicknames });
+    const result = { success: true, nicknames: dropperNicknames };
+    recordCommand(commandId, result);
+    res.json(result);
   } catch (error) {
     res.status(500).json({ error: error.message });
   }
@@ -427,25 +441,33 @@ app.post('/api/recipes/toggle', (req, res) => {
 
 // Enable/disable all recipes
 app.post('/api/recipes/enable-all', (req, res) => {
-  const { commandId } = req.body || {};
-  const cached = checkIdempotent(commandId);
-  if (cached) return res.json(cached);
+  try {
+    const { commandId } = req.body || {};
+    const cached = checkIdempotent(commandId);
+    if (cached) return res.json(cached);
 
-  pushCommandToBridge({ type: 'command', action: 'enable_all', commandId });
-  const result = { success: true, commandId };
-  recordCommand(commandId, result);
-  res.json(result);
+    pushCommandToBridge({ type: 'command', action: 'enable_all', commandId });
+    const result = { success: true, commandId };
+    recordCommand(commandId, result);
+    res.json(result);
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
 });
 
 app.post('/api/recipes/disable-all', (req, res) => {
-  const { commandId } = req.body || {};
-  const cached = checkIdempotent(commandId);
-  if (cached) return res.json(cached);
+  try {
+    const { commandId } = req.body || {};
+    const cached = checkIdempotent(commandId);
+    if (cached) return res.json(cached);
 
-  pushCommandToBridge({ type: 'command', action: 'disable_all', commandId });
-  const result = { success: true, commandId };
-  recordCommand(commandId, result);
-  res.json(result);
+    pushCommandToBridge({ type: 'command', action: 'disable_all', commandId });
+    const result = { success: true, commandId };
+    recordCommand(commandId, result);
+    res.json(result);
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
 });
 
 // Sort barrel
@@ -662,6 +684,7 @@ function updateStateFromBridge(data) {
     smeltable: smeltableRecipes,
     craftable: craftableRecipes,
     craftTurtleOk,
+    dropperNicknames,
     lastUpdate,
     bridgeConnected: bridgeClients.size > 0,
   });
@@ -865,13 +888,24 @@ server.listen(PORT, HOST, () => {
 function shutdown() {
   console.log('\n🛑 Shutting down server...');
   try {
+    wss.close();
+    server.close();
     closeDb();
     console.log('💾 Database closed');
   } catch (err) {
-    console.error('❌ Error closing database:', err.message);
+    console.error('❌ Error during shutdown:', err.message);
   }
   process.exit(0);
 }
 
 process.on('SIGINT', shutdown);
 process.on('SIGTERM', shutdown);
+
+// Catch unhandled errors to prevent silent crashes
+process.on('unhandledRejection', (reason) => {
+  console.error('❌ Unhandled rejection:', reason);
+});
+process.on('uncaughtException', (err) => {
+  console.error('❌ Uncaught exception:', err);
+  shutdown();
+});